ci2-android-6-1/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci2-android-6-1/syz-executor883194576 <...> Warning: Permanently added '10.128.1.121' (ED25519) to the list of known hosts. execve("ci2-android-6-1/syz-executor883194576", ["ci2-android-6-1/syz-executor883194576"], 0x7fff197d82f0 /* 10 vars */) = 0 brk(NULL) = 0x55559102c000 brk(0x55559102cd40) = 0x55559102cd40 arch_prctl(ARCH_SET_FS, 0x55559102c3c0) = 0 set_tid_address(0x55559102c690) = 305 set_robust_list(0x55559102c6a0, 24) = 0 rseq({cpu_id_start=0, cpu_id=RSEQ_CPU_ID_UNINITIALIZED, rseq_cs=NULL, flags=0, node_id=0, mm_cid=0, slice_ctrl={request=0, granted=0, __reserved=0}, __reserved=0}, 32, 0, 0x53053053) = -1 ENOSYS (Function not implemented) prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlinkat(AT_FDCWD, "/proc/self/exe", "/root/ci2-android-6-1/syz-executor883194576", 4096) = 43 getrandom("\x13\x87\xa3\x75\xd5\xfc\xcc\x1b", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55559102cd40 brk(0x55559104dd40) = 0x55559104dd40 brk(0x55559104e000) = 0x55559104e000 mprotect(0x7fec42e05000, 20480, PROT_READ) = 0 mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000 mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000 unshare(CLONE_NEWPID) = 0 rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55559102c690) = 306 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 ci2-android-6-1/strace-static-x86_64: Process 306 attached [pid 306] set_robust_list(0x55559102c6a0, 24) = 0 [pid 306] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 306] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 306] getppid() = 0 [pid 306] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 306] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 306] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 306] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 306] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 306] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 306] unshare(CLONE_NEWNS) = 0 [pid 306] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 306] unshare(CLONE_NEWIPC) = -1 EINVAL (Invalid argument) [pid 306] unshare(CLONE_NEWCGROUP) = 0 [pid 306] unshare(CLONE_NEWUTS) = 0 [pid 306] unshare(CLONE_SYSVSEM) = 0 [pid 306] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 306] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 306] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 306] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 306] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 306] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 306] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 306] getpid() = 1 [pid 306] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< [ 24.056066][ T306] __dump_stack+0x21/0x24 [ 24.108913][ T306] dump_stack_lvl+0x110/0x170 [ 24.113571][ T306] ? __cfi_dump_stack_lvl+0x8/0x8 [ 24.118573][ T306] ? mutex_lock+0x86/0x1b0 [ 24.122969][ T306] print_address_description+0x71/0x200 [ 24.128494][ T306] print_report+0x4a/0x60 [ 24.132802][ T306] kasan_report+0x122/0x150 [ 24.137287][ T306] ? mutex_lock+0x86/0x1b0 [ 24.141686][ T306] kasan_check_range+0x249/0x2a0 [ 24.146599][ T306] __kasan_check_write+0x14/0x20 [ 24.151512][ T306] mutex_lock+0x86/0x1b0 [ 24.155734][ T306] ? __cfi_mutex_lock+0x10/0x10 [ 24.160563][ T306] ? kfree+0x6f/0xf0 [ 24.164433][ T306] ? l2tp_session_put+0xaf/0x1a0 [ 24.169347][ T306] ? l2tp_session_delete+0x3df/0x4d0 [ 24.174609][ T306] pppol2tp_release+0x178/0x2b0 [ 24.179434][ T306] sock_close+0xc9/0x220 [ 24.183663][ T306] ? __cfi_sock_close+0x10/0x10 [ 24.188511][ T306] __fput+0x1fd/0x8f0 [ 24.192478][ T306] ____fput+0x15/0x20 [ 24.196437][ T306] task_work_run+0x1e1/0x250 [ 24.201002][ T306] ? __cfi_task_work_run+0x10/0x10 [ 24.206089][ T306] ptrace_notify+0x23f/0x270 [ 24.210657][ T306] ? __cfi_task_work_add+0x10/0x10 [ 24.215743][ T306] ? __cfi_ptrace_notify+0x10/0x10 [ 24.220830][ T306] ? fput+0x15b/0x1a0 [ 24.224789][ T306] ? filp_close+0x111/0x160 [ 24.229285][ T306] syscall_exit_work+0x84/0x140 [ 24.234128][ T306] syscall_exit_to_user_mode_prepare+0x1c/0x20 [ 24.240262][ T306] syscall_exit_to_user_mode+0xd/0x30 [ 24.245614][ T306] do_syscall_64+0x58/0xa0 [ 24.250005][ T306] ? clear_bhb_loop+0x30/0x80 [ 24.254667][ T306] ? clear_bhb_loop+0x30/0x80 [ 24.259319][ T306] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 24.265188][ T306] RIP: 0033:0x7fec42d84557 [ 24.269590][ T306] Code: 48 89 fa 4c 89 df e8 48 1f 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff [ 24.289167][ T306] RSP: 002b:00007ffd07072dd0 EFLAGS: 00000202 ORIG_RAX: 0000000000000003 [ 24.297561][ T306] RAX: 0000000000000000 RBX: 000055559102c3c0 RCX: 00007fec42d84557 [ 24.305508][ T306] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 24.313471][ T306] RBP: 00007fec42dda126 R08: 0000000000000000 R09: 0000000000000000 [ 24.321419][ T306] R10: 0000000000000000 R11: 0000000000000202 R12: 00007fec42ddbdf0 [ 24.329364][ T306] R13: 00007fec42dda08e R14: 00007fec42e05bc0 R15: 0000000000000002 [ 24.337311][ T306] [ 24.340305][ T306] [ 24.342605][ T306] Allocated by task 306: [ 24.346818][ T306] kasan_set_track+0x4b/0x70 [ 24.351402][ T306] kasan_save_alloc_info+0x1f/0x30 [ 24.356486][ T306] __kasan_kmalloc+0x95/0xb0 [ 24.361051][ T306] __kmalloc+0xb4/0x1e0 [ 24.365179][ T306] l2tp_session_create+0x38/0xbd0 [ 24.370192][ T306] pppol2tp_connect+0xbf5/0x1640 [ 24.375101][ T306] __sys_connect+0x3da/0x460 [ 24.379664][ T306] __x64_sys_connect+0x7a/0x90 [ 24.384403][ T306] x64_sys_call+0x88d/0x9a0 [ 24.388882][ T306] do_syscall_64+0x4c/0xa0 [ 24.393293][ T306] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 24.399161][ T306] [ 24.401459][ T306] Freed by task 306: [ 24.405328][ T306] kasan_set_track+0x4b/0x70 [ 24.409890][ T306] kasan_save_free_info+0x2b/0x40 [ 24.414909][ T306] ____kasan_slab_free+0x132/0x180 [ 24.419993][ T306] __kasan_slab_free+0x11/0x20 [ 24.424731][ T306] slab_free_freelist_hook+0xc2/0x190 [ 24.430073][ T306] __kmem_cache_free+0xb7/0x1b0 [ 24.434911][ T306] kfree+0x6f/0xf0 [ 24.438603][ T306] l2tp_session_put+0xaf/0x1a0 [ 24.443339][ T306] l2tp_session_delete+0x3df/0x4d0 [ 24.448422][ T306] pppol2tp_release+0x169/0x2b0 [ 24.453244][ T306] sock_close+0xc9/0x220 [ 24.457461][ T306] __fput+0x1fd/0x8f0 [ 24.461418][ T306] ____fput+0x15/0x20 [ 24.465373][ T306] task_work_run+0x1e1/0x250 [ 24.469938][ T306] ptrace_notify+0x23f/0x270 [ 24.474519][ T306] syscall_exit_work+0x84/0x140 [ 24.479345][ T306] syscall_exit_to_user_mode_prepare+0x1c/0x20 [ 24.485469][ T306] syscall_exit_to_user_mode+0xd/0x30 [ 24.490814][ T306] do_syscall_64+0x58/0xa0 [ 24.495205][ T306] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 24.501078][ T306] [ 24.503402][ T306] The buggy address belongs to the object at ffff8881108e1000 [ 24.503402][ T306] which belongs to the cache kmalloc-512 of size 512 [ 24.517426][ T306] The buggy address is located 336 bytes inside of [ 24.517426][ T306] 512-byte region [ffff8881108e1000, ffff8881108e1200) [ 24.530681][ T306] [ 24.533007][ T306] The buggy address belongs to the physical page: [ 24.539417][ T306] page:ffffea0004423800 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1108e0 [ 24.549646][ T306] head:ffffea0004423800 order:2 compound_mapcount:0 compound_pincount:0 [ 24.557958][ T306] flags: 0x4000000000010200(slab|head|zone=1) [ 24.564023][ T306] raw: 4000000000010200 0000000000000000 dead000000000001 ffff888100042f00 [ 24.572587][ T306] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 [ 24.581142][ T306] page dumped because: kasan: bad access detected [ 24.587551][ T306] page_owner tracks the page as allocated [ 24.593257][ T306] page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 92, tgid 92 (klogd), ts 3860794547, free_ts 0 [ 24.612683][ T306] post_alloc_hook+0x1f5/0x210 [ 24.617435][ T306] prep_new_page+0x1c/0x110 [ 24.621916][ T306] get_page_from_freelist+0x2ca9/0x2d20 [ 24.627439][ T306] __alloc_pages+0x1fa/0x610 [ 24.632014][ T306] alloc_slab_page+0x6e/0xf0 [ 24.636580][ T306] new_slab+0x98/0x3e0 [ 24.640641][ T306] ___slab_alloc+0x70f/0xb70 [ 24.645211][ T306] __slab_alloc+0x5e/0xa0 [ 24.649519][ T306] __kmem_cache_alloc_node+0x204/0x2d0 [ 24.654951][ T306] __kmalloc_node_track_caller+0xa1/0x1e0 [ 24.660659][ T306] __alloc_skb+0x226/0x4a0 [ 24.665059][ T306] alloc_skb_with_frags+0xa8/0x620 [ 24.670155][ T306] sock_alloc_send_pskb+0x87f/0x9a0 [ 24.675334][ T306] unix_dgram_sendmsg+0x5c1/0x1710 [ 24.680422][ T306] __sys_sendto+0x4ac/0x660 [ 24.684900][ T306] __x64_sys_sendto+0xe5/0x100 [ 24.689662][ T306] page_owner free stack trace missing [ 24.695004][ T306] [ 24.697306][ T306] Memory state around the buggy address: [ 24.702909][ T306] ffff8881108e1000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.710945][ T306] ffff8881108e1080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [pid 306] close(3) = 0 [pid 306] close(4) = 0 [pid 306] close(5) = -1 EBADF (Bad file descriptor) [pid 306] close(6) = -1 EBADF (Bad file descriptor) [pid 306] close(7) = -1 EBADF (Bad file descriptor) [pid 306] close(8) = -1 EBADF (Bad file descriptor) [pid 306] close(9) = -1 EBADF (Bad file descriptor) [pid 306] close(10) = -1 EBADF (Bad file descriptor) [pid 306] close(11) = -1 EBADF (Bad file descriptor) [pid 306] close(12) = -1 EBADF (Bad file descriptor) [pid 306] close(13) = -1 EBADF (Bad file descriptor) [pid 306] close(14) = -1 EBADF (Bad file descriptor) [pid 306] close(15) = -1 EBADF (Bad file descriptor) [pid 306] close(16) = -1 EBADF (Bad file descriptor) [pid 306] close(17) = -1 EBADF (Bad file descriptor) [pid 306] close(18) = -1 EBADF (Bad file descriptor) [pid 306] close(19) = -1 EBADF (Bad file descriptor) [pid 306] close(20) = -1 EBADF (Bad file descriptor) [pid 306] close(21) = -1 EBADF (Bad file descriptor) [pid 306] close(22) = -1 EBADF (Bad file descriptor) [pid 306] close(23) = -1 EBADF (Bad file descriptor) [pid 306] close(24) = -1 EBADF (Bad file descriptor) [pid 306] close(25) = -1 EBADF (Bad file descriptor) [pid 306] close(26) = -1 EBADF (Bad file descriptor) [pid 306] close(27) = -1 EBADF (Bad file descriptor) [pid 306] close(28) = -1 EBADF (Bad file descriptor) [pid 306] close(29) = -1 EBADF (Bad file descriptor) [pid 306] exit_group(1) = ? [pid 306] +++ exited with 1 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=306, si_uid=0, si_status=1, si_utime=0, si_stime=7 /* 0.07 s */} --- exit_group(0) = ? +++ exited with 0 +++ [ 24.718977][ T306] >ffff8881108e1100: fb fb fb fb fb fb fb fb f